Ultrasonic Pulse Signal Diffraction from Different Flaws in Elastic Media
The analysis of the processes of acoustic wave interaction with the reflectors of different shape located in an isotropic elastic medium has been carried out. To analyze the changes of instantaneous frequency of reflected signals in time, the algorithm based on the use of the continuous wavelet transform was applied. It has been demonstrated that reflected signals can have the frequency modulation different from that in the probe signal. Furthermore, under certain conditions, the central frequency of the spectrum of reflected signal can differ noticeably from the value corresponding to the probe signal.
acoustic waves reflectors diffraction instantaneous frequency wavelets
Dmitry V. Perov Anatoly B. Rinkevich Yakov G. Smorodinsky
Institute of Metal Physics Ural Division of Russian Academy of Sciences;Ekaterinburg, Russia
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
799-804
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）